Machine for heating rivets, &amp;c.



A. C. TAYLOR.

MACHINE FOR HEATING RIVETS, QC. APPLICATION FILED MAY I, I920.

Patented 0m: 5,1920.

3 3 SHEETS-SHEET I.

A. C. TAYLOR.

MACHINE FOR HEATING RIVETS, &c. APPLICIAI'ION FILED MAY 1', 1920.

1,354, 59, v Patented 001;. 5,1920.

3 SHEETS-SHEET 2.

amvewtcvz A.G'. TAYLOR.

UNITED STATES PATENT OFFICE.

atsnnrrs c. TAYLOR, or WARREN, onto, assrcnoa TO THE TAYLOR WELDER com- PANY, or WARREN, 01-110, a coaronarion,

MACHINE FOR HEATING RIVETS, 8w.

Application filed May 1,

To all whom it may concernf Be it known that I, ALBnnTIs C. TAYLOR, a citizen of the United States, residing at \Varren, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Machines for Heating Rivets, &c., of which the following is a specification.

.This invention relates to a machine for heating rivets, etc., and the object of the invention is to provide a machine adapted to hold a pair of rivets for a short interval of time in an electric heating circuit in which the rivets themselves form part of the circuit and electrically in series therewith. The rivets are also held in an angular or inclined position where both are plainly visible and readily engaged and removed singly and successively when heated to the required degree. The machine is relatively small, compact and portable; it will heat a pair of rivets in a few seconds; the rivets are heated internally and uniformly which gives an ideal upsetting condition; scale on the rivets is reduced to a minimum, and there is no waste; no current is consumed when the full complement of rivets are not in place; the heating of the rivet is under perfect control; and the machine is exceptionally simple and easy to operate.

In the drawing accompanying this application, Figure 1 is a side view of the machine showing a rivet in place as in heating operations. Fig. 2 is a front view of the machine. Fig. 3 is a plan view and section on line 33, Fig. 1. Fig. 4 is a rear view and end elevation on line l-fl, Fig. 1. Fig. 5 is a diagram of an electric 'circuit showing thesecondary circuit of the transformer and two rivets and a conducting bar of my machine connected in series, as in heating operations. v p

The machine comprises a skeleton frame made of separate strips of angle-iron united together in a particular way so as to support a set of heating and clamping conductors for the rivets in an inclined plane, in plain view and reach of the operator. Thus, each side of the frame comprises a straight piece of angle iron adapted to form a rear leg 2, and a bent piece of angle-iron providesa front leg 3 with a slanting extension 4 united at its upper end with the upper extremity of rear leg 3 by a plate 5 and rivets 6. The lower extremities of legs 2 and 3 are united Specification of Letters Eatent.

Patentetltlct. 5, 1920.

1920. Serial No. 378,273.

by a cross piece 7 and also by a relatively long piece of angle-iron 8 which is riveted at its lower end to leg 2 and extends upwardly and forwardly at an angle of about 45 degrees to a point where it intersects bend 9 in front leg 3 and thence projects about ten inches upwardly and forwardly beyond this bend. Right-angled clips 10 and bolts 11 unite the inclined piece 8 to leg 3 and said piece functions as a brace forthe frame and a support for an asbestos guard 12, a pair of electrodes 13 and 14', and a pan 15. The sides of the frame are alike and the corresponding legs connected by tie rods 16 and 17 and straps 18, while an angle-iron 19 and a wide yoke 20 connect the corresponding inclined braces 8. Two straddle irons 21 and 22 also unite the slanting portions 4 of legs 3, and parallel guides 23 are fixed to the elevated portions of the saddle pieces 21 and v A heavy block or bar 21 of copper having end enlargements 25 is supported to slide on guides 23 with the enlargements 25 situated directly opposite the electrodes or terminals 13 and 1% of the secondary band 27 of a transformer 28 which is bolted and clamped in an inclined position beneath and between the slanting portions at of legs 3 of the skeleton frame.

The transformer electrodes or terminals are secured and seated in an immovable insulated position upon yoke piece 20 of the skeleton frame, and the bar 24 rests freely in a movable position on the slides and is adaptedto be shifted back and forth at either end in respect to the electrodes to per: mit rivets R of varying length to be introduced and engaged and clamped in an in clined position between the enlargements 25 and the vertically inclined face of the elem trodes substantially as shown in Figs. 1 and 2. Because bar 2% is mounted to slide in an inclined position it tends to move by gravity.

toward the electrodes and its own weight is sufiicient to clamp and hold the rivets in place; however I also utilize apair of coil springs 29 to hold bar 24: in sliding engagement with guides 23 and these springs also tend to move the bar toward the electrodes":

ets for the bent extremities of links 31 and the said parts are held in free-playing relation by loops 33 affixed to the slanting portion 4 of legs 3 and through which loops the links 31 extend and have perfect freedom of movement.

Upon pressing either treadle 30 the corresponding end of'the conductor bar slides an arc on the guide pieces 23, the fulcrum or point of turning being at the head of one of. the rivets where it engages the enlargement 25. The weight of the bar tends to maintain this contact with one rivet while it is being tilted for the purpose of introducing or removing a second rivet, and contact isalso maintained by the spring 29 for the treadle which is not being operated.

' lVhen both rivets are removed bar 24 is prevented from moving downwardly beyond a predetermined point as fixed by an adjustable stop or rest consisting of a short piece of angle-iron 34 securedtransversely to the lower end of a slotted plate 35 which is mounted upon saddle pieces 21 and 22 and adapted to be secured in adjusted osition thereon by a clamping screw 36. top piece 34 is long enough to engage both enlargements 25 when a rivet is not being held by the conductor bar, and the rocking or tilting movement of bar 24 may still be effected when the rivets are absent; that is, the fulcrum or pivotal pointis then at the point of engagement of one enlargement 25 with the stop piece 34, while a fulcrum may also be said-to be established at the point of union between the bent extremity of the link 31 for the idle treadle.

The rivets are handled by tongs or other suitable gripping instruments, and when a rivet is accidentally released it will fall upon the inclined asbestos table 12 and pass down between the spaced terminals of th e transformer and out at the front side of the machine. An electric switch 38 is also mounted upon the front side of the skeleton frame between legs 3 wherewith to control the electric heating current passing through the transformer. It should also be particularly noted that in order to heat rivets or other objects it is necessary to place the two rivets or objects in series in the electric circuit, and that the separate conducting bar 24 is also placed in series with these rivets or objects and becomes a part of the heating circuit, see Fig. 5.

The machine shown and described herein asa rivet heater is not necessarily limited or confined in use to the heating of rivets only; it may also be used for heating metal bars for bulldozers and for heating any object which is to be forged or worked. Therefore, the term rivet wherever used in the description and claims should not be interpreted too literally. What I claim is: 1. A machine for heating rivets, etc., comprising a transformer having a secondary circuit with stationary terminals, and a movable conductor mounted-opposite said terminals adapted to place, a pair of rivets in series in said circuit. 4

2. A machine for heating rivets, etc., comprising a set of workheating and clamping elements mounted and adapted to operate in an inclined plane and with the work accessible and also inclined.

3. A machine for heating rivets, etc., comprising a transformer having separate stationary electrodes, a clamping conductor movably mounted opposite and adapted to hold a piece of work against each stationary electrode, and means adapted to shift said conductor back and forth in respect to said electrodes.

4. A machine for heating rivets, etc., comprising a transformer having electrodes, a clamping conductor for the rivets movably mounted opposite said electrodes, and an adjustable stop to limit the movement of said conductor toward said electrodes.

5. A machine for heating rivets, etc., comprising a transformer having stationary electrodes, a conducting bar mounted to tilt opposite and adapted to clamp the work to be heated against each electrode, and means fidapted to effect a tilting movement of said 6. A machine for heating rivets, etc., comprising a transformer. having secondary bands provided with terminals stationed in an inclined plane, and a current conducting member for holding and heating the rivets movably situated opposite said terminals.

7 A machine for heating rivets, etc., comprising a transformer having seating terminals for the rivets, a current-conducting rivet holding member movably situated opposite said terminals, and selective mechanisms adapted to tilt said member alternately at its opposite ends.

8. A machine for heating rivets, etc., comprising a transformer having terminals with inclined rivet seating faces, a current-conducting rivet holding member movably situated opposite said inclined faces, and separate treadle mechanisms adapted to shift the opposite ends of said member alternatively.

9. A machine for heating rivets, etc., comprising a transformer having separate work'- seating terminals, a movable current-conducting bar situated opposite said terminals adapted to hold a separate piece of work against each terminal, separate treadle mechanisms adapted to force said member away from said terminals, and springs adapted ed to force said bar toward said terminal.

11. A machine for heating rivets, etc., comprising atransformer having stationary secondary terminals, guides opposite said terminals, a current-conducting and rivetholding bar slidably mounted upon said guides, and treadle mechanisms adapted to slide said bar upon said guides.

12-. A machine for heating rivets, etc., comprising a transformer having terminals with inclined work-seating faces, inclined guides opposite said inclined faces, a current-conducting and work-holding bar seated upon said guides, and means adapted to cant saidbar in respect to said terminals.

13. A machine for heating rivets, etc., comprising a transformer having secondary bands provided with stationary terminals, inclined guides opposite said terminals, a current-conducting and work-holding bar vslidably seated upon said guides, an adjustable stop adapted to limit the movement of .said bar toward said terminals, and separate spring-pressed treadle and link connections adapted to tilt the opposite ends of said'bar in respect to said terminals.

14. A machine for heating rivets, etc., comprising a skeleton frame. a transformer having secondary bands with separate terminals secured in a stationary and insulated position upon said frame, a separate currentconducting and work-holding bar slidably seated upon said frame opposite said terminals, and separate treadle connections adapted to shift the opposite ends of said bar alternatively in respect to said terminals.-

15. A machine for heating rivets, etc., comprising a skeleton frame having separate transformer terminals secured in a fixed inclined position thereon, a current-conducting and work-holding bar movably seated in an inclined position upon said frame opposite said terminals, means adapted to limit the movement of said bar toward said terminals, and means adapted to shift said bar.

16. A machine for heating rivets, etc., comprising a skeleton frame having inclined brace members, a transformer supported upon said frame having secondary bands provided with terminals secured in a fixed inclined position upon said brace members, a separate current-conducting and work-engaging bar having an inclined seat upon said frame opposite said terminals, and separate treadles connected with the opposite ends of said bar adapted to tilt the bar in respect to said terminals.

17. A machine for heating rivets, etc., comprising a skeleton frame having separate inclined seats. and a transformer and its secondary terminals and a current-conducting and rivet-holding bar placed in apposition upon said inclined seats and adapted to hold a pair of rivets in an inclined and accessible position during heating operations.

18. A machine for heating rivets, etc., comprising a frame. a transformer mounted in an inclined position upon said frame having secondary bands with terminals fixed in an insulated and inclined position, a guard plate fixed in an inclined position between said secondary bands. and a current-conducting and work-holding bar movably mounted opposite said terminals. I

19. A machine for heating rivets, etc, comprising a skeleton frame, a transformer secured to said frame having a secondary band with seating terminals for the work fixed in an insulated position upon said frame, a pan above and a guard plate beneath said terminals, and a current-conducting and work-engaging bar slidably mounted upon said frame opposite one. side of said terminals.

20. A machine for heating rivets, etc., comprising a skeleton frame having sides with slanting portions and inclinedbraces intersecting and extending beyond said portions, a transformer fixed upon said frame having its secondary terminals fixed to said inclined braces, a current-conducting and work-engaging bar slidably supported in a slanting position opposite said terminals, and a treadle at each side of said frame connected with the end of said bar.

Signed at 'arren. in the county of Trumbull and State of'Ohio, this 27 day of April, 1920.

ALBERTIS o. TAYLOR. 

